Assigjtoe of one half to



(No Model.)

B. HAMBUJER.

COMBINED LATCH AND LOOK. No. 371,577. Patented Oct. 18, 1887.

UNITED STATES PATENT Orricn.

EPHRAIM HAMBUJER', OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO S.WIGHTMAN STEVVARI, OF SAME PLACE.

COMBINED LATCH AND LOCK.

SPECIFICATION forming part of Letters Patent No. 371,577, dated October18, 1887.

(No model.)

To all 107mm it may concern:

Be it known that I, EPHRAIM HALWIBUJER, a citizen of the United States,residing at Detroit, in the county of \Vayne and State of Michigan, haveinvented certain new and use ful Improvements in a Combined Latch andLook, of which the following is aspecification, reference being badtherein to the accompanying drawings.

[0 This invention relates to new and useful improvements in a combinedlatch and lock; and the invention consists in the novel construction andarrangement of different parts, all as more fully hereinafter described.

In the drawings which accompany the specification, Figure 1 is anelevation of the lock with the cover of the lock-case removed.

Fig. 2 is a cross-section on line a: x in Fig. 1.

Fig. 3 is a face view of the lock. Fig. 4 is a cross-section on line y gin Fig. 1.

A is the lock-case.

B is the faceplate secured to the lock-case.

O is the latch-bolt.

D is the spring projecting the latch-butt.

E is a fulcrum-stud for the tension-coil of the spring D.

F is the knob-spindle.

G is the hub of the knobspindlc.

H is the actuating-arm on the knob-spindle.

I is the key-hole.

J is the tumbler, pivotally secured at or about midway of its lengthbelow the latchbolt on a fulcrum-pin, K, so as to swing in a planeparallel with the plane of the bolt. One end of this tumbler projects inproximity to the key-hole to be operated on by the key, and the oppositeend projects in proximity to the faceplate. Near its forward end thistumbler is provided with a shoulder or stud, M, which in the operationof the lock is adapted to engage with a notch, N, formed on the loweredge of the latch-bolt, and the arm 0 of the latch-spring is adapted tohold the tumbler in such engagement by its pressure upon the pin 1?.

L is a pin rotatively secured in the faceplate and projecting with itsfree inner end into proximity of the forward end of the tumbler. Thispin is preferably screw-headed, 50 and carries at its free end an arm oreccentric,

B, so arranged that by turning the pin L on its axis this arm oreccentric willengage upon the forward end of the tumbler and depress thelatter sufficiently to bring its stud M out of engagement with the notchN on the latchbolt, as shown in Fig. 2; but when in normal position, asshown in Fig. 1, it will not interfere with the free action of thetumbler. The forward end of the tumbler is provided with a suitableshoulder or offset, S, to engage with the arm or eccentric R to operatein the prescribed manner. In practice the pin L thus operates as acatch, whereby the tumbler is made inoperative or operative, as desired.\Vith the catch adjusted in its operative position, as shown in Fig. 1,the lock cannot be operated without the use of a suitable key adapted tolift the rear end of the tumbler sufficiently to disengage its stud Mfrom the notch N of the latch-bolt and to throw the latchbolt jointlytherewith.

If the pin L is turned half a revolution by means of an ordinaryscrew-driver, the tumbler is made inoperative and the latch-bolt may beoperated freely by turning the knob.

An advantage of my construction is that the nature of the lock is noteasilydisclosed by its outward appearance, the serewhead L of the pin Lbeing especially calculated to divert dis covery, while at the same timethe lock is ex ceedingly simple and easily operated, either as a latchor look, by simply turning the pin L half a revolution ahead or back bymeans of a screw-driver or the equivalent use of the thumbnail of theoperator.

In manufacturing the lock for an outside mortise door lock I preferablyprovide it on the side which comes on the inside of the door with aknob, a, which turns in a bearing formed in the lock-case, and hassecured to its 0 inner enda hub carrying the two arms I) a. The arm b isadapted to retract the latch-bolt in turning the knob in the properdirection, there being a shoulder, cl, formed on thelatchbolt, againstwhich thearmbstrikes. The arm 5 0 is adapted to engage with a lug, 6,formed near the pivotal point or hub of the tumbler, and by means ofsaid engagement the tumbler is disengaged from the latch-bolt before thelatter is retracted, there being a lost motion 10o between the arm I)and the shoulder d. Thus by means of the knob a the lock maybe opened onthe inside without using any key.

What I claim as my invention is- 1. In a, combined latch and lock, thecombination, with the latch-bolt, of a tumbler pivotally secured belowsaid bolt and operating in a plane parallel therewith, and pro- Videdwith an arm projecting forwardly in proximity to the face-plate of thelock, and a pin rotatively secured in the face-plate and provided at itsinner end with anarm or eccentric adapted to depress the forward end ofthe tumbler and hold the same in an inoperative position, substantiallyas described.

2. In a combined latch and lock, the combination, with the latch-bolt,of a tumbler hung midway of its length upon a pivot to swing in a planeparallel with the plane of the latch-bolt, and having therearwardly-projecting arm, against which the key operates, and theforwardly-projecting arm carryinga stud to engage into a notch on thelatch-bolt, a

spring having its tension'coil secured upon a fulcrum-pin and operatingwith one arm on the latch-bolt and with the other on the tumbler, and anadjustable catch secured in the faceplate of the lock, adapted todepress the for scribed, of a catch consisting of a screwheaded pinrotatively secured in the face-plate of the lock, and having an arm oreccentric adapted to act on the tumbler, substantially as described.

In testimony whereof I affix my signature, in

presence of two witnesses, this 16th day of 40 August, 1887.

E. HAMBUJEB.

Witnesses:

H. S. SPRAGUE, J AS. WHITTEMORE.

